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Severe Thunderstorm Watch 226
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WW0226 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 226
   NWS STORM PREDICTION CENTER NORMAN OK
   455 AM CDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN ARKANSAS
          NORTHERN LOUISIANA
          A SMALL PART OF WESTERN MISSISSIPPI
          NORTHEAST TEXAS
   
   EFFECTIVE THIS WEDNESDAY MORNING FROM 455 AM UNTIL 1000 AM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH
   NORTHWEST OF MONTICELLO ARKANSAS TO 40 MILES SOUTH OF SHREVEPORT
   LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
   
   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.
   
   OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
   TORNADO WATCH NUMBER 222. WATCH NUMBER 222 WILL NOT BE IN EFFECT
   AFTER 455 AM CDT. CONTINUE...WW 223...WW 224...WW 225...
   
   DISCUSSION...ELEVATED CONVECTION IS INCREASING IN COVERAGE/INTENSITY
   IN RESPONSE TO LOW-LEVEL WAA ATOP A COLD POOL FROM EARLIER STORMS
   ACROSS LA/MS/AR.  A FEED OF RICH MOISTURE FROM S OF THE BOUNDARY
   WILL MAINTAIN MODERATE INSTABILITY...WHILE DEEP-LAYER VERTICAL SHEAR
   IS FAVORABLE FOR ORGANIZED STORMS...INCLUDING SUPERCELLS.  LARGE
   HAIL WILL BE THE MAIN SEVERE THREAT...THOUGH DAMAGING WINDS COULD
   PENETRATE THE SHALLOW COLD POOL WITH ANY CELL MERGERS AND UPSCALE
   GROWTH INTO CLUSTERS.  THE SRN PART OF THE WATCH AREA WILL CONTINUE
   TO BE MONITOR FOR MORE SURFACE-BASED STORMS ALONG THE BOUNDARY.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
   MOTION VECTOR 26040.
   
   
   ...THOMPSON
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Page last modified: April 27, 2011
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